wow poor thing. ok youve got some good info so far. i would get some good shampoo and duoxo ps shampoo is very good for skin issues. you could try an apple cidar vinegar rinse or perhaps a lemon rinse would be better. slice a lemon and put in boiling water for a minute then turn off and let sit over night then put in a spray bottle. you may also want to get some duoxo pads to. i would also start him on some zinc for his skin 20mg for a large dog. i would also look at a good probiotic. anything to boost the immune system. vit c might help i give sarah 125mg twice a day as the effect wear off after a bit. zyrtec might be better for allergy use as its long term where benadryl will wear off in 4 hours. perhaps put a shirt on him in case he is laying on something that is bothering him. i would certainly get a blood allergy test its not perfect but a good place to start. the sensitive tummy and the things maybe a food allergy and probably environmental to. there are several limited ingredient foods you can try. zignature makes several perhaps try the lamb one. there is also natures variety limited ingredient that is at petco. finding a bullies protein then moving on from there is so important. you could try a bland diet of beef and brown rice or millet. moving can also make allergy symptoms worse as the climate is different. floor carpet just anything can cause this. i would change food or even home cook then go from there. home cooking has helped me so much with sarah. i am going to tag [MENTION=4225]Twice[/MENTION] who may have some more advice.