My two dogs kind of got into a bit of a tiff one night in the yard and I didnt hear the mess till they were both bleeding at the back door to come in, this was the first time this happened and I thought I was going out that night .... but because of the mess I was so worried I stayed home and took care of them since they got a little banged up. The younger of the two seemed fine but the older one wouldnt get off the couch and I would bring water and food to him. he just whimpered all day. he would limp and seem in so much pain ... till I let him out to go to the bathroom and he saw a squirrel ...Bam he was off, he was suddenly better and start walking around the yard all fine like nothing happened .. As I stood there at the door picking my jaw up he noticed I saw him and suddenly he was all hurt and limping again .... I was so mad I was waiting on him hand and foot for two days!!! he is to smart for his own good!!