If it's new, definitely get it checked out by the vet
We took in a stray " Mr Robbie the Stretch " mid january this year, and when He finally
gained the trust from me ( mainly because I was feeding him
) I discovered
while petting him that he had a strange protruding lump on his rib cage
vet
checked him over and concluded that it was an old injury that has healed, feels weird
petting him as it sticks out a fair bit, feels like the tip of a finger
but it too doesn't bother him
best to get him checked out anyway