Your dog may want to go away from the puppy or may growl or even snap to tell the puppy to go away. However, if your older dog uses his teeth on the new puppy, that is not normal, and it may be time to consult with a veterinary behaviorist.
It can take up to one month for an old dog and new dog to really settle in and accept each other's position in the pack. If you want a second dog, you need to be ready to commit to this process and not panic.
The most common symptoms of inter-dog aggression include growling, biting, lip lifting, snapping, and lunging toward another dog. These behaviors may be accompanied by fearful or submissive body postures and expressions such as crouching, tucking the tail under, licking the lips, and backing away.
These are clear expressions of non-aggressive social invitation. Warning signs include stiffness in the body; standing tall; ears pricked hard forward; growling; hard direct eye contact; stiffly raised, fast-wagging tails; lunging on the leash; and aggressive barking.
Many older dogs will be upset, jealous, or even angry with a new puppy, especially if the older dog has been an only dog. It's going to be important to make sure the older dog gets lots (more than normal) of attention to alleviate potential hurt feelings.
The amount of time each individual pet needs to adjust to their new homes will vary, but the 3-3-3 rule helps give an approximation of what new pet owners can expect. The 3-3-3 rule refers to the first 3 days, the first 3 weeks, and the first 3 months after bringing a shelter animal home.
Introduction of a New Pet
Bringing home a new puppy or another adult dog can trigger jealousy in your dog, and they may show signs of aggression toward the new addition. Your dog might growl at the new dog, guard your lap, or try to get in between you and your new furry family member.
Let your dogs sniff each other and greet each other normally. Give them positive reinforcement through calm verbal affirmations. After letting them play for a while, put both dogs in a “sit” or “stay”, then let them interact again. Finally, take them on walks together, allowing them to sniff each other along the way.
For example, if a dog doesn't like you, they may find some of your behaviors annoying, especially if you constantly do things that a lot of dogs are known to hate, like getting in their face, hugging them, teasing them, or yelling at them.
In dogdom, there's a turn of phrase called, "Second Dog Syndrome". This describes the process of adding another dog to the home quite well, but not necessarily in a positive light. As humans, we are bound to forget all of the time and effort it takes to raise a puppy right.
Your dog is used to being your companion, and if there are other dogs that are taking you away, they are going to act upset, jealous, and even angry. This new puppy is also on their territory, and they may feel like their life is in jeopardy. This behavior is perfectly normal.
Illness or injury. If a dog is at all unwell and suffering from injury or illness after giving birth, this can lead to rejecting a litter. Sometimes, mothers can contract mastitis which causes inflammation, pain and discomfort in the teats which will cause her to avoid nursing her pups.
First, you may want to start with a simple deep breathing exercise called the 5-5-5 method. To do this, you breathe in for 5 seconds, hold your breath for 5 seconds, and then breathe out for 5 seconds. You can continue this process until your thoughts slow down or you notice some relief.
For example, if you get a new pet and start paying it more attention than your dog, the dog will not feel betrayed in the true sense of the word. However, it may show signs of distress and disappointment because it is suddenly being treated differently or being deprived of something it is used to getting.
It is okay to have feelings of regret about getting a puppy. It doesn't make you a bad person and it doesn't mean you shouldn't have your puppy. Feeling inadequate as a pup parent is quite common, but luckily there are things you can do to help with those feelings!
Dogs are social animals and usually happier around other dogs, but a second dog will never be a substitute for inattentive, absent or too busy owners.
Many breeders recommend that your first dog be at least one-to-two-years old before you add a second to the family. If you have an old dog, they may not be physically able to play with or tolerate a pup.
Before settling on a breed, think about the gender of the dog. For the happiest dogs and the safest household, opposite sex dogs almost always do best together. Many same-sex combinations of dogs will fight, sometimes to the death. Those who work out a dominance order may not fare much better.