Ok, today I went out and fetched with my dog for awhile. I tossed his dummy into a pile of bursh... He dove in, yipped, grabbed the dummy and brought it back... Nothing showed any signs of him hurting himself or anything. But just a while ago, he started limping. And now, he cant put presure on that foot. Whats up? He wont let me look at it. I dont want to make a trip to the vet right now so... I need help!