Just to update, Fred seems to be healing, and there is no more marks! I am fairly certain it is not Marvin, I have been watching them and they both just seem to move out each others way! The second Fred chatters Marvin moves, the same applies to Marvin!
I did speak to the women I got Marvin from and she explained that she had treated Marvin for mites and the treatment protects them for roughly a year, which could explain why Marvin isn't really affected?
We haven't had any funny business no fighting or anything along these lines recently, Previously I had, had balls of fur but no chattering or aggresion just lunging and neither was hurt this hasn't happened in more than a week and it did only happen 4 times in 4 weeks! Both piggies come down for veggies in the morning, Fred does hide when eating his veggies but I have seen Marvin steeling them which is probably why Fred keeps a firm eye on him when munching, and only seen this on one occasion! They eat fairly close by two and both allow each other to eat!
Both seem able to go anywere they want, so I don't think they have fell out, and even though they have a huge run and there cage both seem to stay less than a stone throw away from one another.
I'm going to treat them the Xeon tomorrow as that is the 8th day, and continue to monitor them!
Fingers crossed!
