Dog Groomers Qs on shampoos

Hello!

Just wanted to ask some dog groomers a few Qs:

- Where do you buy your grooming shampoos from?
- How often do you find you run out / have to rebuy the 5L shampoos?
- Which brands do you like best / buy most often?
- Which types do you use most? Sensitive, deep clean , detangling etc?
- Do you use a spray/cologne after groom?
- Any other favoured products?

Thanks