Thank you all for the advice, it's been a live and learn experience with Nikki. I love him sooo much, I can't imagine (nor do I want to) a world without him. I was going through so much depression and anger issues and I would be in my room feeling sorry for myself and I would hear *click click click* and here he would come and jump in my bed and snuggle up to me and give me sweet puppy kisses

In a very roundabout way, he saved my life and brought me out of depression and now out of a family of six, he is closer to me and my mom than anyone else.
Piepiper, I am SOOOOOOO sorry for your loss!!! I can't imagine something so horrible happening, I would just be beside myself. I will tell my mom what you have said so maybe it will help us be stronger and not give in. He was just mooching for some of my bacon this morning and I remember looking down as I was throwing away the scraps and looked at him and almost considered giving him some but went ahead and threw it away because he didn't eat his good food. I really try hard to be strong, but what you said helps. Still I am so incredibly sorry for your loss.
I think I'll mention the food allergies idea to my mom, she said he's going to the vet this friday to get his yearly shots updated so I will bring this up to her. Thank you all for your help and warm welcomes!