Whilst trying to get a HR from your feline patients, it can be quite difficult to hear when they are purring away! A good tip I got from a vet student was to put a small amount of surgical spirit on a swab and rub it on there nose, works wonders and doesn't cause a huge amount of stress
PS: Whilst you're here, take a moment to see our latest job opportunities for vet nurses.
Also putting them near a window (if you have a clear one) as distraction can help... they like a good view!