Contact allergy help

You can give Benedryl long term -- 1 mg/lb body weight and DO give it at least twice a day.  Part of the way it works is giving the body anti-histamine to help deal with the allergens on a daily basis.

Plain black tea -- wipe her belly off with it every time she comes in -- wipe her down ALL OVER with it (soak her paws in it) -- it helps deal with the oils in the grass and the allergens.  Stick a plastic baggie in your purse with a couple of paper towels saturated with tea and wipe her off before you start for home.

BATHE HER at least weekly -- with a mild soap (very very mild -- like Kirk's castile or Dr. Bronner's DILUTED) and then a rinse at the end with water and a bit of tea tree oil.  This will keep the coat in good shape and it will help keep the oils from the allergen off her.

I'm not familiar with goat's milk soap -- castile or hemp soap are very very basic non-irritating soaps.  (actually so pure you can eat them - you can use Dr. Bronner's to brush your teeth in it's diluted form).

If you look at the grocery store or in a pharmacy -- ASK what is absolutely the gentlest soap - that should work.  Kirk's is really old-timey.  It's been around for a 100 years or so.  Nope -- since 1839 LOL

Kirk's website

Dunno if it's in Canada -- but it's cheap and easy here.  Baby soap always used to be castile soap.

Also, COVER HER. Put some shoes on her feet, and a t shirt on her body. I know it sounds ridiculous, but if she has to be on grass, her skin needs to be covered up so that she gets less contact.