Hmm. Personally I don't see anything wrong with a SMALL saddle. I am going to buy a light, pony saddle for my weanling to wear a little, when he's a year or so. Just putting it on for a few minutes and taking it off. Western saddles seem heavier to me then english, so maybe talk to her about getting a cheep little saddle on ebay
or craigslist, or maybe a racing saddle, thoes are VERY light.