Unfortunately Seiah is allergic to grass. It's okay if he walks over it, it's just when he starts playing and rolling around in it. He was playing again in the grass today, and his tummy got red again. I guess its just carpet or cement for him.
Im glad that you found out what the problem was. atleast now you wont worry about what was giving him bumps!
Im not sure if someone else asked this question on the original post..well I guess not since you just found out that it was the grass causing the allregic reaction..But could it maybe be the pesticides that the grass is sometimes sprayed with. I dont know if that happens with dogs but I remember my friend used to be allergic to it.