In Conclusion. A pet parent or breeder can choose their breed, breed them at the optimum time, and feed them highly nutritious meals throughout the year. But, they cannot determine the size of the litter – that's up to Mother Nature.
Divide their weight at 20 weeks by their current age in weeks and multiply by 52. So for a puppy who weighs 35 pounds at 20 weeks: 35÷20=1.75, 1.75×52=91 pounds. Simply double their weight at 6 months of age.
It's a bit of an old wives tale that you can tell exactly how big a dog will be by looking at her paws. Just like people, some puppies have much larger or smaller paws than their ultimate size would indicate. That said, paws actually are a decent approximation if you're just looking for a general gauge.
As a basic guideline to his adult size, a puppy is likely to be slightly smaller than the larger breed in the cross when fully grown. Qualities of temperament in a particular breed can be offset by qualities in the crossbreed. For example, the more even character of a Labrador may balance a Boxer's bouncy personality.
You would think that the biggest pup would be the first born but the size of the pup doesn't always correlate with the birth order. Many times the largest is born last or the smallest born first.
You can estimate the size of your dog as an adult by analyzing its paws. If its paws appear too big for its body at 16 weeks, it will grow bigger. But if they appear perfect for its body, it's grown fully. Your dog has developed the right proportions for its adult body.
The other way to predict a puppy's adult size is to look at his paws: Big dogs start out with relatively big puppy paws. But, be warned, nothing is foolproof.
Diet: How much your dog eats in its first year of growth can affect whether they grow larger or smaller than average. An underfed dog that may experience stunted growth may end up smaller, while an overfed dog may grow larger than average for its breed.
Predict your puppy's size by its weight and age in weeks.
First, weigh your dog. Then, divide their weight by their age in weeks. Multiply that number by 52 (which is the number of weeks in a year). That number will give you a rough estimate of how big your dog will be when they reach adulthood.
In conclusion, one can learn things about a puppy's temperament as early as 4-5 weeks, although the older they get the more you can learn and the more reliable a temperament test. By 6-8 weeks, a breeder should be able to tell you many details about your pup's personality.
Smart dogs are innately great problem solvers, Cabral says. So to test your pup's problem-solving abilities, get her a food puzzle (a toy that has to be manipulated in a certain way to get to a treat). If she can solve it without your help, she's smart, Cabral says.
If either mom or dad has all dominant genes, the puppy will take up their traits and resemblance. If one of the parents has all recessive genes, the likelihood of the puppy resembling either parent is 50-50.
When conceived, a dog receives two copies of DNA—one from the father and one from the mother. Which pieces of DNA a dog inherits from each parent is completely random. Within each strand of DNA are genes. And these genes determine traits such as coat color, ear type, tail style and more.
Bottom Line. The runt of the litter is usually the smallest puppy in the litter, and many people assume that this pup will stay small as an adult dog. However, there is no guarantee that a runt will remain small; many runts catch up to their littermates in size as they mature.
Avoid buying the largest or smallest puppy in the litter. Instead, look at the litter size -- generally, the more puppies in the litter, the healthier they will be.
In most cases, if the runt of a litter makes it to six to eight weeks, it will probably survive and likely grow close to full size, experts said.
Take the pup's weight in pounds (at a certain age) and divide it by his age in weeks, then multiply that number by 52 (the number of weeks in a year). This should predict your pup's ideal adult weight.
How big will my puppy be when he is full grown? Many veterinary experts predict a 4 to 5-month-old pup is roughly half his adult size. Your pup is probably going through a growth spurt, and will likely be adorably awkward for the next couple of months. Keep track of your pup's growth rate.
A puppy born in a litter of many puppies can be labeled the runt simply because it is the smallest among several or more puppies. Obviously, in a litter of six big puppies, a puppy of a smaller size will be easy to spot. This small puppy labeled the runt may actually be of normal size for its age.
Not necessarily. Runts can and often will grow to match the size of their siblings. However, it is possible for the runt to remain smaller than the other puppies even when fully grown. With the proper attention and care, most runt dogs catch up.
Size doesn't matter
And size isn't always an obvious clue. “Male dogs tend to be larger than female dogs, however, the exact size difference is dependent on the breed,” says Colleen-Demling Riley, certified dog trainer and canine behaviorist, Dogtopia.
So, yes, a puppy can definitely think of you as his “mother” — that is, his provider and protector — and develop as strong an emotional bond with you as if you were blood-related. Your puppy will also quickly learn to pick you out among strangers, both by sight and through his powerful sense of smell.
When dogs breed, the mother and father each randomly contribute one allele from each locus, giving each allele a 50% chance of being passed on to the pups. One of the alleles at each locus is dominant and determines the traits, like coat color, portrayed in the dog.
Since dogs are historically pack animals, it would make sense that a dog would remember their family even after many years of not seeing their mom or dad. If your dog does not recognize another dog, they'll still probably start out by sniffing them, but they probably won't get as excited.