My dog keeps barking and yelping in pain what should I do?

hi mike your moms dog could have had a reaction to the front line she will need to be taken to the vets i don't understand why your mom would react like this if a dog in is pain and left in pain it is animal cruelty your mom may just take her dog to the vets i don't understand how your mom can simply ignore the the fact her dog is in pain and wont do anything about it no animal should be left in pain i know your trying to get suggestions on here if the dog has tumors and she is suffering then the most humane thing to do is get her put to sleep good for you at least your trying to help the poor dog i would suggest your mom don't get any more dogs i am sorry you have to deal with this it should be your mom.