To get back the dog, you will need to sue your ex in court. You will need to prove ownership of the dog to get full possession of the dog. Evidence will be bill of sale or contract to buy the dog, vet bills, microchip owner in the dog, food and care bills for the dog, etc.
Contact Animal Control or Local Authorities: If the person refuses to return your dog, you can contact local animal control or the police. Provide them with the evidence of ownership and explain the situation. They may be able to assist you in getting your dog back.
Answer. People who believe that their animal is being wrongfully withheld can commence a civil lawsuit (such as a replevin action) to try to get the animal returned and can also contact the police, although the police do not usually get involved in pet custody disputes.
If your dog has been taken wrongfully, perhaps by a family member, or ex non-marital partner, it is possible to use the property status of your animal to obtain a judgment. Replevin is an effective civil remedy to get your dog back.
Legally would be the person who purchased the dog. Unless you gave it to another person as a gift or surrendered it to a shelter or other such organization.
You can do this by going to your local small claims court and filling out the complaint packet. You will then file it and serve it on your ex. The judge will then hold a hearing to determine liability and damages and if the dog should be returned to you, etc.
You will not go to jail. You have 21 days to respond to the complaint. However, the 21 days on the clock do not start to run until you are actually served with the summons by the process server.
When filing a replevin suit, the plaintiff must provide evidence that they are the rightful owner of the property in question and that it was taken without justification or consent.