1. the lump is located on his left side, above the ribcage.
2. it is below the skin.
3. i'm not sure, we didn't really notice it at first, it seemed to get bigger overnight.
no, i didnt notice the lump at first so i dont know how long it took for it to come on, once we had noticed we decided to keep an eye on it and if there were any changes in him to then take him to the vet.
thanks for your answer, this has put my mind to rest a little, will see what the results are from the vets tests..