Need to grow a new mane quickly

How quick could a horse grow a new mane? Our stallion (8 years old) has a habit of sticking his head through the gate and greet people. This has lead to him losing hair in his mane.

I need something simple and quick that will help start thicken and grown his mane.

Definitely try some MTG. It really works, & it works quickly too. & some conditioner as well.

I second the MTG. I would put it on after the sun sets though. So it has the whole night to seep in.

I 3rd the MTG it works wonders! But I recommend wearing gloves while applying it! It smells but it works wonders!

I've never used MTG, would it help thicken and grow an appys thin mane, or am I asking for the impossible?

It would be the only thing I can think of that would help grow it, it is definitely worth a shot, it isnt an expensive the to buy, I can get it where I live for like $9 a bottle

Used it on my apps thin tail. It grew in length and got thicker too.

I never put it on her mane though, but I put it on my qh's mane and it's grown