Table 3.

Timeline: Products given and questionnaires, tests and evaluations done during study period

Time	Questionnaires and visits	Food, rescue analgesia and tested products	Outcome variables, other tests and evaluations
			Questionnaires	At clinic
W−8	Internet / posted questionnaire		Descriptive data. Questionnaire on pain items, including HCPI. Lameness and QOL VAS. Use of NSAIDs / adjuvant analgesics.
W−8to W−2	Telephone interview		Questions about unclear answer in the inclusion questionnaire
W−2	Screening visit	New feed started.	Questionnaire on pain items, including HCPI. Lameness and QOL VAS. Use of NSAIDs / adjuvant analgesics.	Thorough veterinary evaluation + lameness, jumping and stairs on video. PVF, Impulse. Blood samples (inclusion). Radiographs.
W0	Baseline visit	Oils started. Rescue NSAID given to owner.	Questionnaire on pain items, including HCPI. Lameness and QOL VAS. Use of NSAIDs / adjuvant analgesics.	Veterinary evaluation: Lameness, jumping and stairs on video. PVF, Impulse. Blood samples.
W4	4 weeks after baseline		Questionnaire on pain items, including HCPI. Lameness and QOL VAS. Use of rescue analgesic. Adverse effect questions. Comparative questions: locomotion, every-day situations and skin and hair-coat.
W8	8 weeks after baseline		Same as at W4.
W12	12 weeks after baseline		Same as at W4.
W16	End visit (16 weeks after baseline)	Feed and oils stopped.	Questionnaire on pain items, incl. HCPI. Lameness and QOL VAS. Use of rescue analgesic. Adverse effect questions. Comparative questions: locomotion, every-day situations and skin and hair-coat. Final assessment of outcome. Guessing group.	Veterinary evaluation: Lameness, jumping and stairs on video. PVF, Impulse. Blood samples.