It is probably a tumor. I'd guess it is benign, as I've heard of more than one ferret with a benign tumor on the end of its tail. You should take your ferret to the vet, as this is not normal and could be harmful.
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It's a tail.
Shunosaurus had a round spiked tail. Stegosaurus, also had a tail with four large spikes.
The end of it's tail
ferret marmot elephant cat rat
The boys discover a large rock, which they name Castle Rock, at the tail end of the island. They also find that it is a more desolate and uninhabited area compared to the rest of the island.
The tuft of fur at the end of a lion's tail is commonly referred to as a "lion's tail tuft" or "lion tail brush."
The tail is the end with the smaller
It's kind of like a large sausage shape with a leg at each corner and a tail at one end and a large cat like head at the other end
First the tail stock then the flukes are the part at the end of the tail.
The tail end. :)
Tones on Tail ended in 1984.