Do they smell more as they age?

[Tigermoth]

I know dogs and cats get smellier as they get older but my pair seem over the last couple of weeks to smell just much more piggy. It’s not terribly unpleasant but a bit farmyard...

 

[piggieminder]

I've not noticed mine get smellier as they age, ( have 6 with mixed ages 1 - 6) but they do smell more 'farmyard' when they have had certain foods. Spring greens, cabbage the brassica type foods.