Hello, I'm Dr. Kara. I have over 20 years of experience as a veterinarian and I'd like to help. Please give me a moment to review your concerns.
I understand that your veterinarian prescribed Seleen shampoo (a shampoo formulation that contains selenium sulphide) to treat cheyletiella mites on your puppy but something else was used instead.
I am confused about what product was applied instead.
Was it Veet hair removal cream?
Or are you worried because rather than mixing the shampoo with an equal volume of water and then using the mixture to lather her coat your wife used the shampoo directly from the bottle?
I see we were typing at the same time!
So the correct product was used, but not diluted first.
Was your puppy's coat wet and then the shampoo applied?
If your pup's coat was wet and the shampoo wasn't allowed to sit on her coat/skin very long then she is likely to be fine.
The concern with these products is that they can burn the skin if used at a high concentrate level and left on for a period of time.
But by quickly rinsing the product off it is very likely that the product did not have time to cause any excess irritation.
The downside of course is that the product may not work very well because it wasn't on her coat/skin long enough to remove the scaly debris and kill the mites.
She may need to be treated for an additional week.
But I don't believe any harm was done.
Watch for red skin, any oozing or raw areas. But that is unlikely to occur.
If she seems uncomfortable and more itchy than usual you can give an antihistamine called chlorpheniramine (known as Piriton in the UK) at a dose of 4mg per dog every 12 hours.
Yes, cheyletiella is very very contagious. All furry pets (dogs, cats, guinea pigs & bunnies) need treatment.
And all bedding well washed in steaming water and vacuum everywhere she's been to remove eggs every couple of days, then throw the bag away.
In severe infestations the home may need to be treated too.
You can use pyrethrin based flea area treatment sprays to treat your home.
Do you have any further questions for me?
You are very welcome, good night.