I have had a stray mixed breed outside dog for 6 years. I estimate his age to be 7 or 8 years. Yesterday he appeared to be fine - playing, eating and normal behaviour. Last night I noticed he was limping - which has progressed to both front and back legs stiff and weak. I have manipulted his leges looking for muscle soreness broken bones, sores or bites. I found nothing. Neither did he appear to be botherd by my checking. I kept him inside last night (which is something he generally does not tolerate) and he appears to be worse this morning. he was lethargic but also moved around quite a bitlike he was trying to get comfortable. He ate a little this morning and drank a little water. Please tell me what might be wrong.

