Neat Defects for Babbies

[Bruja]

Uncontrollable drooling. Just saliva, everywhere.

[ratty]

Bloody Mary defect - horse is always covered in dripping blood

[Ashes]

Voice deterioration, tissue in throat progressively deteriorates, causing extreme soreness and pain (maybe bleeding too?) until making any noise becomes painful.

[Lavender]

Cries painful small gemstones or crystals
Creaking joints - very loud pops and creaks with any movement
External heart

[ratty]

mane and tail are actually snakes that constantly bite their host horse

[Jassal]

Vomit Birthing so their jaw unhinges and they have the barf up their babies.

Edited because, as Colby pointed out, this will enable male/male couples to have babies.

[Ashes]

Small lungs, breathing is difficult and movement distance/speed is severely limited due to lack of oxygen

[ratty]

lactates constantly (upon maturity)

[Ashes]

Achilles's Heel - Characters's tendons are abnormally fragile and may snap from strenuous activity; additionally, the area is weaker than normal and extremely prone to injury in general.

[Jassal]

Solar Powered: character is powered by the sun, so they can’t move at night or during cloudy weather. They can still talk or be moved by others, though.

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Spider host: spiders of varying sizes live inside the character, sometimes crawling out of their mouth mid sentence or from any wounds they receive. They have no control over the spiders.