Among all Belgian draft horses, Petra is the strongest. Her owner is Stefan Creemers.
Petra is het sterkste Belgisch trekpaard.

 What a stunning creature she is. Also, she listens very well to her handler. Great horse!  My Opa had a Nederlands Terkpaard or a Dutch Draft in English, he was a beast of a thing, huge not just in height but in muscle and weight. He loved working, but when he didn't he got fussy. You would try to take him out for a walk and he wouldn't budge, make him change stables and he would just stand there, looking at you, but if you got out his work harness, well then you had one happy horse. He lived happily until 3 years ago when he hurt himself due to old age so my Opa retired him and he passed away just last year, 31 years of age. His name was Sterk which is Dutch for Strong.  Beautiful girl, doing what she's born and bred to do, and loving it! For all those who scream "abuse": Do you see that several times she is without rein and still doing her work Petra does know her strength and that she has the ability to stop when she wants, but doesn't because she ENJOYS HER WORK. She's well fed, well cared for, and looks like a fit and healthy draft.  Upset people - Please note, this teamster is more "whoa" that "go" with mare. I see him popping the reins to get her attention back to him, otherwise she looks like she'd pull those logs into the next town. She is very well behaved for being SO game to pull. She obviously loves to throw her weight into that collar and make things move. She certainly is bred for the job. Her Teamster yells encouragement during the pulling contests and her expression is keen. And aside from needing equipment adjustments (better padded collar, better harness and a different bit) I say good for them. He found a GEM in this mare and his admiration and affectionate pats are proof of that.  She has the strongest concentration I have ever seen! most horse pull, give a little and need a little push to get going again. all she needs is the go-ahead, and she is through it with very obvious determination. WOW. most amazing horse I have seen.