Personally if the animal in question is eating drinking and has normal physical functions is no reason to kill the animal just ask yourself if it were a human remember all animals age like humans unless the dog is severe pain or has other issues than you described sounds like nothing more than old age I recommend having your dog checked and a simple cbc Panel check to see how the vitals are this is the least costly way to see if there are any underlying problems that could be an issue otherwise let the dog live and go his/her way peacefully 🐶
It's hard to do but do your dog a favor don't let them suffer
She has trouble walking goes to the bathroom and lays back down in it trouble sleeping just let's out screens at times so sad to see have 3 other pets had them since they were born still have the mother she's fine
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