Our 6 month our Basset hound has a bit of a limp on his front left leg. This happened after exercise last week. On Wednesday evening we went to the little park near where we live and a 6 yr old GSD turned up. I was a little nervous at the time, but Monty and GSD met, and then spent about 10 minutes or so running around and playing. They clearly loved it, there was no growling or anything. It was truely a joy to watch. Anyway, once we got home I noticed Monty was walking a little stiff after a nap. I was a little concerned, but it wasn't hugely noticable and after walking around little he seemed to improve. So on the Thursday I checked him over, and he seemed fine, so we went out for his exercise again, a short walk then over to the park for a bit of a run around. Monty kept laying down after a few minutes and didn't seem overally interested in play, so after about 10 mins we took him home as we thought maybe he was still tired after all that run around with the GSD the evening before. Once we got home, he had his usually drink of water and then napped. Once he woke up he was badly limping, I immediately checked on him, rubbed my hands down his leg, checked his pad etc. He didn't make a sound and seemed totally disinterested in his leg and foot being touched. I have had him on my lap (on the floor) so I can feel that he is putting weight on the 'bad' leg, but not as much as the other leg. We have had him on rest (no walkies) on Friday and Saturday. On Sunday the limp seemed improved (it was a lot better Saturday morning, but got worse during the day), so I took him out for a quick 3 minute walk to the end of the road and back, hoping that maybe a short gentle (well as gentle as a 6 month old puppy will walk!) might help loosen up the leg. We got home and instead of charging around (which he usually does after exercise), he just had a drink and laid down. The limp is still there today, although not as bad. And he does still charge around the house after the cats and his ball! Are we right to keep him rested at home (e.g. no walkies) for a few more days and see how it goes, or should we be worried about there being a more serious issue, like a green stick fracture? (one of our kittens had one of these before, not sure if puppies suffer from them too, but the kitten didn't put leg on floor and cried when leg was touched). He isn't holding the leg off the floor or anything and my hubby says he has likely just pulled a muscle or something and that I shouldn't worry so much. But I hate seeing him limp and seeing him lay down more than usual. Any advice? I didn't want to take him to the vet unnecessarily, but if it is more serious I don't want to leave him as he is.