She's a good looker for a feed-store buy. This seems to be one breed that people get some good examples of out of hatcheries and other sources which often produce quite poorly examples of other breeds. She looks quite good in her first pics too, no obvious health issues.
Time will tell how extreme this change is, I guess. Some fluctuations in nutrition cause slightly curled feathers, but I have several different types of feather mutations from several sources in my flock and there's lots of naturally altered feather shapes out there which have nothing to do with nutrition.
If those white feathers are not pure white, but retain the lacing, I'd think she possibly has SLW in her ancestry. I can't quite see if they're also laced or edged with color but in that pic it looks like it. (?)
I've had a fair few feather color changes crop up over the years, but changing to frizzle type has not been one of them.
Some extreme changes can occur though and there's always the exception to the rule.
Changing diet can alter appearance and it generally kicks in within a year or so and can continue to develop for years. From my hens I've learned that many chooks don't stop growing/developing until they're 3 on average, and that includes wattles/comb/feathering coloration/size etc. My Light Sussex hen looked good for her breed at one year old, in her second year developed red feathers on her back, in her third year developed more black all over the place, now looks poor for her breed pattern wise.
That wormer you mentioned I've not heard of causing feather abnormalities but I will double check just in case... Did so, not noted, but then again apparently it's a horse wormer and I couldn't find any info on its effects on birds, but, I didn't look too long. If I recall correctly it contains ingredients already used on birds anyway and not known for causing feather deformities.
Would be good to see more pics in future and see how she turns out.
Best wishes.
Time will tell how extreme this change is, I guess. Some fluctuations in nutrition cause slightly curled feathers, but I have several different types of feather mutations from several sources in my flock and there's lots of naturally altered feather shapes out there which have nothing to do with nutrition.
If those white feathers are not pure white, but retain the lacing, I'd think she possibly has SLW in her ancestry. I can't quite see if they're also laced or edged with color but in that pic it looks like it. (?)
I've had a fair few feather color changes crop up over the years, but changing to frizzle type has not been one of them.
Some extreme changes can occur though and there's always the exception to the rule.
Changing diet can alter appearance and it generally kicks in within a year or so and can continue to develop for years. From my hens I've learned that many chooks don't stop growing/developing until they're 3 on average, and that includes wattles/comb/feathering coloration/size etc. My Light Sussex hen looked good for her breed at one year old, in her second year developed red feathers on her back, in her third year developed more black all over the place, now looks poor for her breed pattern wise.
That wormer you mentioned I've not heard of causing feather abnormalities but I will double check just in case... Did so, not noted, but then again apparently it's a horse wormer and I couldn't find any info on its effects on birds, but, I didn't look too long. If I recall correctly it contains ingredients already used on birds anyway and not known for causing feather deformities.
Would be good to see more pics in future and see how she turns out.

Best wishes.