When is abandoning your pet justified?
The answer is very simple: NEVER. A family member should never be dumped for no reasons and leaving them in a shelter is also ABANDONMENT.
If you have an illness, you or someone close to you take them to a residence for temporary care.
If the illness is serious and it's going to prevent you from living with a pet, find a home from someone close to you so the separation is as less traumatic as possible.
If you get pregnant, you do not have to leave your cat no matter how much doctors say there are ways to prevent toxoplasmosis, demand your doctor first to do an analysis for if you have antibodies, which is most likely and otherwise, to give you some tips for living with your cats, like getting another member of your family to clean the tray.
A tip, if you are of a certain age, leave your inheritance to the one who takes care of your pet making sure that someone verifies that it is well taken care of, you'll see how there are cakes to keep it.
If you die, you don't care but your heirs have the obligation to take care of your pet, you inherit everything or nothing, if you don't like animals they have the legal obligation to care for it because it is part of the hereditary flow.
If you move, you look for one where you can admit your pet and don't move to that house.
If you leave the country, your pets have to go with you, there are no excuses, they are one more part of the family and FAMILY IS NOT ABANDONED.
Another question, according to the animal protection law Castile and Leon are responsible for the animals both owners and forks, that is if a neighbor leaves you an animal to take care of it and you get tired and abandon it, you are legally responsible for the abandonment of that animal.