I didn't see your other post about this.  But I was/am under the impression
that dander is the solid leftover from saliva after it's dried/evaporated on
the cat's fur - a result of self-grooming.  However, I also seem to think
that saliva is just one component of dander??

Cathy

The allergen that your husband is allergic to is Fel d1 (Feline domesticus
allergen 1).  Its a protein that's secreted by the cat's sebaceous glands in
the skin, and also by the salivary glands and in the urine.  Dried Fel d1
easily becomes airborne; once airborne its easily inhaled.

He is allergic to Eros and not Oscar because Eros probably (certainly)
secretes higher concentrations of Fel d1 than Oscar.  You probably can
reduce the volume of Fel d1 on Eros by wiping him down regularly with
Allerpet - which was developed to reduce Fel d1 on cats.  Regular wipe-downs
should lead to progressive reductions in the quantity of Fel d1 accumulating
on the cat and in the environment.  A 12 oz bottle runs about $10-$12 and
should last you a couple or 3 months.

I'm not crazy about the ingredients but I haven't seen any reports of
adverse effects.  Nevertheless, speak to vet about it before trying it.

Phil