I was trying to look out for that and I picked the brand with a much lower sodium content. It had 150mg of sodium per 60g portion so I didn't think it would be much of an issue. I also soaked the piece in water before feeding as a 'just in case'.

I don't think I will be feeding these often anyways - I just wanted to give them a shot. I will be keeping an eye out for fresh/frozen ones though.