Hello! I have an almost senior dog (8 y/o) and I noticed she's been very picky with her food lately. Her food diet is mostly chicken, chicken organs, and beef ( cooked ) with carrots or pumpkin and apples for snacks. I put dry kibbles too but she isn't really a fan of it ever since she was a puppy. I just wanna ask if you can suggest the best food for senior dogs? Thanks!! P.S. She is taking joint supplements and fish oil.