Anal Glad Question

[owned by toys]

I know, not the most pleasant issues to discuss but would appreciate some advice from others.

I have toy poodles, all fed the same and have been for a number of years.

I express their glands regularly and notice that the colour, texture etc does differ between some of them.

Does a change in colour, texture etc indicate possible internal health issues. I feel that it might but not sure how to read the signs.

In a normal healthy dog what should it be.

Really appreciate your thoughts.