I helped my dad put in a 1000 gallon pond last summer. We didn't add
any fish to the pond last summer because we wanted to make sure that
we got everything right (no need to kill a bunch of goldfish before we
know what we're doing).

By the end of the summer, the marsh took hold and the plants came in
-- water tests were great.

We've spent time this spring fishing the plants back out and setting
up the pond again -- and we added our first set of fish last weekend
(easter weekend).

We added two Fantails, two Shubunkins, and two Orfes (our "fish guy"
said that they were good for mosquito control).

We have a problem. One of the Shubunkins has become very aggressive
towards one of the fantails -- constantly chasing it around the pond,
seemingly nibbling at the 'joint' where the tail meets the body. The
fantail has developed a white spot at that 'joint' where the Shubunkin
is nibbling.

We decided to give the shubunkin to a neighbor who has an actual pond
(not a water garden). Couple of questions:

1. What can we do to help our fantail? There is a white spot at that
'Joint' and it seems to be having a bit of trouble using it's tail.
Sorry for the seemingly basic question, but we are brand new to this
(2 weeks into fish ownership).
2. Is this normal behavior for Shubunkin? Should we be concerned
that the other shubunkin will exhibit this behavior?
3. If it's not normal, are Shubunkin school fish? Should we get
another?

Thanks for taking the time to read this. I appreciate it.