Hello and welcome. Thank you for requesting me. Some additional information will be helpful.Is Taco the only bunny in his cage?What color is he?Once I have this information, it will take few minutes to type up your answer. You'll be notified when I post it. Thank you.Anna
He only has his toilet, food and water in the cage and he is the only one.. He is free to jump around the room, he usually sleeps on the side of the bed or under it. He is brown/white colour. I tried to take a picture of the lump but there is too much fur and he won't be still for so long.It doesn't seem to hurt him, I think he is just annoyed with me feeling it all the time.
Got a quick picture.. it looks like this http://img546.imageshack.us/img546/6246/14uo.jpg I can't get any closer
Thank you for you fast answer. I will make an appointment at the vet. I'm from central Europe, but still thank you for the link, I saw it has some great articles.
Thanks again for the help, hope you have a great weekend.