Thanks guys.
Barneys been a bit quiet the past few weeks, I took him to the vets as he had not been himself and had been quite lethargic. The vet moved his back legs around and came to the conclusion he may of had a silly fall resulting in his right leg being a bit "gratey" (I still don't know what that means). He had a two week course of Loxicom and has now had one week without it and he is definitely more mobile then he was. In fact he did a binky today, something I only ever see Chloe do and guess what happened? He fell down a hole! :lol: Hopefully it hasn't upset his leg, it was a bit of a comedy and typical Barney moment. Of course him being a giant could mean he has arthritis which could be causing him leg issues, but he's only 2 so we thought that was unlikely.
The vet said he wouldn't need to go back if things have improved but I still may take him back in the near future to see if his right leg feels any different!