Surfin' Chantel is a solid chestnut born in fall 2013. Her sire was the bay tobiano Rainbow Warrior and her dam the solid chestnut Surfin' Scarlett. Both of her parents have died and she's both of their last offspring living on Assateague. Her full sister Rainbow Swirl passed away at age 5. The fall 2013 buybacks had a bit of a rough start so Chantel is shorter than she should be. She's had two foals kept for the herd, solid black Talia and chestnut tobiano Mimi's Bayside Bella who were both sired by bay tobiano Maverick.

Chantel is a solid chestnut so she would test as e/e. Chestnuts must receive a copy of it from each parent. She received one copy of chestnut from her chestnut dam. Her sire carried chestnut recessively.
https://www.thecolorfulchincoteague.com/chestnut.html

She's had two black foals so far, including Talia. That tells us that she either doesn't carry agoui or only has one copy.

Chantel's sire was tobiano but as a solid she didn't inherit it. Without testing we don't know if she might carry any white boosters like W20 or not.
https://www.thecolorfulchincoteague.com/tobiano.html

This is a mare I've found out a lot about, except her registered name! She was born in 1982 and is a daughter of the solid chestnut stallion Simon. Deb Noll snapped a picture of her as a foal and with her sire. The first photo is her in 1989, her buckskin foal by Gunner's Moon is on her other side. Her brand was messed up somehow so her identification number brand is unreadable. Her foals from at least 2002-2004 were sold under the identification number 90. The real 90 was a different mare who had died by then (her brand was readable!) and her name was Teague or Teagie. Kelly Lidard called this mare "the false Teague". For lack of options I call her Teague and the real #90 Teagie. Such are the joys of researching old ponies.

Teague was a chestnut so she would have tested as e/e, as all chestnuts do. She received one copy of chestnut from her chestnut sire and another copy from her unknown dam.https://www.thecolorfulchincoteague.com/chestnut.html

The most interesting part of Teague was that she definitely appears to have had splashed white. She only had a round star, tiny snip, and two small hind socks. That's pretty common for ponies that only have one copy of splash. Two of her foals, 1988's Once Upon a Time and 2003's Aladdin, had blue eyes. The second photo is of her and Aladdin. Here's an article about her 1988 foal: https://www.outsideonline.com/culture/essays-culture/last-ride-chincoteague-pony-legend (no she's not a descendant of Watch Eyes). Teague's tobiano foals looked to have more than just tobiano, more white on them than you'd expect. Splashed white would have come from her dam since her sire had no white at all. Simon had several mares that could have had splash, including Surfer Dude's dam Gremlin. Until we find out more info on Teague it remains a possibility that she was a half sister to Surfer Dude.
https://www.thecolorfulchincoteague.com/splash.html
https://www.thecolorfulchincoteague.com/mixedpinto.html