Laelocattleya leaves rimmed with yellow-brown

[Acharn]

The Cattleya I bought last week has bloomed and I'm delighted. I'm fairly sure it's a Laelocattley hybrid NOID, because I have another that looked much the same when it was in bloom. I noticed when taking a picture today that two of the older leaves are yellow around the edges, and wondered if this is something to be worried about. It's a nice large plant, and there's a new pseudobulb already growing at the other end of the rhizome.