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Federal Register / Vol. 86, No. 200 / Wednesday, October 20, 2021 / Rules and Regulations Chlortetracycline amount
Combination in grams/
ton
xlii 25 to 2,800 to provide 350 mg/head/day.

Lasalocid, 30 to 181.8

Beef cattle weighing up to 800
pounds: For control of bacterial pneumonia associated with shipping fever complex caused by Pasteurella spp. susceptible to chlortetracycline; and for the control of coccidiosis caused by Eimeria bovis and E. zuernii.

xliii 25 to 2,800 g/ton to provide 350 mg/head/
day.

Lasalocid, 30 to 181.8;
melengestrol acetate, 0.25 to 2 g/ton to provide 0.25 to 0.5 mg/
head/day melengestrol acetate.

Growing beef heifers fed in confinement for slaughter up to 800
pounds: For control of bacterial pneumonia associated with shipping fever complex caused by Pasteurella spp. susceptible to chlortetracycline, control of coccidiosis caused by Eimeria bovis and E. zuernii, increased rate of weight gain, improved feed efficiency, and suppression of estrus heat.

xliv 25 to 2,800 g/ton to provide 350 mg/head/
day.

Lasalocid, 30 to 181.8;
melengestrol acetate, 0.5 to 2 g/ton to provide 0.5 mg/head/day melengestrol acetate.

Replacement beef heifers up to 800
pounds: For control of bacterial pneumonia associated with shipping fever complex caused by Pasteurella spp. susceptible to chlortetracycline, control of coccidiosis caused by Eimeria bovis and E. zuernii, and suppression of estrus heat.

xlv 500 to 4,000 to provide 10 mg/head/day.

Lasalocid, 30 to 181.8

Cattle weighing up to 800 pounds:
For the treatment of bacterial enteritis caused by Escherichia coli and bacterial pneumonia caused by Pasteurella multocida susceptible to chlortetracycline; and for the control of coccidiosis caused by Eimeria bovis and E. zuernii.

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Limitations Hand feed continuously at a rate of 350 mg chlortetracycline and 1 mg lasalocid per 2.2 lb. body weight daily to cattle with a maximum of 360 mg of lasalocid per head per day. Do not allow horses or other equines access to feeds containing lasalocid. No withdrawal period is required. A withdrawal period has not been established for this product in pre-ruminating calves. Do not use in calves to be processed for veal. See 558.311d of this chapter. Lasalocid as provided by No. 054771 in 510.600c of this chapter.
The melengestrol acetate Type C
top-dress medicated feed must be top dressed onto or mixed at feeding with a Type C medicated feed containing 25 to 2,800 g/ton of chlortetracycline and 30 to 181.8 g/
ton lasalocid to provide 350 mg chlortetracycline per head daily and 1 mg lasalocid per 2.2 lb. of body weight daily with a maximum of 360 mg lasalocid per head per day. See 558.311d of this chapter. Chlortetracycline, lasalocid, and melengestrol as provided by No. 054771 in 510.600c of this chapter.
The melengestrol acetate Type C
top-dress medicated feed must be top dressed onto or mixed at feeding with a Type C medicated feed containing 25 to 2,800 g/ton of chlortetracycline and 30 to 181.8 g/
ton lasalocid to provide 350 mg chlortetracycline per head daily and 1 mg lasalocid per 2.2 lb. of body weight daily with a maximum of 360 mg lasalocid per head per day. Do not exceed 24 days of feeding. See 558.311d of this chapter. Chlortetracycline, lasalocid, and melengestrol as provided by No. 054771 in 510.600c of this chapter.
Hand feed continuously for not more than 5 days at a rate of 10 mg chlortetracycline and 1 mg lasalocid per 2.2 lb. body weight daily to cattle with a maximum of 360 mg of lasalocid per head per day. Do not allow horses or other equines access to feeds containing lasalocid. No withdrawal period is required. A withdrawal period has not been established for this product in pre-ruminating calves. Do not use in calves to be processed for veal. See 558.311d of this chapter. Lasalocid as provided by No. 054771 in 510.600c of this chapter.

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