Research carried out in 2004 found that up to 15% of does suffered from sore hocks [2] and up to 40% had paw injuries that were sufficiently serious for them to show signs of discomfort [3].

Please remove spaces between words.
Researchcarriedoutin2004foundthatupto15%ofdoessufferedfromsorehocks[2]andupto40%hadpawinjuriesthatweresufficientlyseriousforthemtoshowsignsofdiscomfort[3].