So our 6 year old male cat has been under the weather since the weekend. I noticed he had gone off his food on Sunday, which is unheard of, and he started finding quiet corners to sleep in. He normally is very chatty and affectionate but just wanted left alone. I noticed he was limping when he came upstairs on Monday evening so made an appointment for the vet to check him over yesterday. She could find no evidence of broken bones and doesn't think he's been hit by a car or been in a fight, but is definitely sore around his back legs. She gave him a painkiller by injection and an anti-inflammatory and said he could be showing signs of joint pain. To give him Metacam for the next few days with his food and hopefully he'll perk up soon. I don't think he has eaten anything overnight and when I carried his food bowl to him this morning he turned away. How do I get him to take the painkillers if he won't eat, and how long is safe for him to go without food? I would really appreciate some advice. Thanks.