Fennec Foxes as pets?

These animals are not meant to be pets. however it is possible and has been done before. you will need a large outdoor inclosure and a steady supply of small animals to feed it. this is not a dog, like you stated. you will most likely need to feed it a balanced diet of mice, rats, fruit and or vitamin supplements. All of this will not be cheap either. the animal itself will cost thousands to buy, and then the enclosure will cost thousands more to maintain. feeding and grooming it will take atleast an hour per day, and cost big $. if you want to get it neutered, finding a vet to do it will be difficult and expensive. Like you said, this isnt a dog. My suggestion? try to sell your mom on the Ginuea Pig. it is common, easy to maintain and cheap.