Segment Information - Disaggregated Revenues by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 28, 2024	Dec. 30, 2023
Segment Reporting Information [Line Items]
Revenues	$ 656,436	$ 634,533
Operating segments
Segment Reporting Information [Line Items]
Revenues	656,400	634,500
Pet Segment
Segment Reporting Information [Line Items]
Revenues	427,462	409,222
Pet Segment | Operating segments
Segment Reporting Information [Line Items]
Revenues	427,500	409,200
Garden Segment
Segment Reporting Information [Line Items]
Revenues	228,974	225,311
Garden Segment | Operating segments
Segment Reporting Information [Line Items]
Revenues	228,900	225,300
Other pet products | Operating segments
Segment Reporting Information [Line Items]
Revenues	124,900	127,700
Other pet products | Pet Segment | Operating segments
Segment Reporting Information [Line Items]
Revenues	124,900	127,700
Other pet products | Garden Segment | Operating segments
Segment Reporting Information [Line Items]
Revenues	0	0
Dog and cat products | Operating segments
Segment Reporting Information [Line Items]
Revenues	160,700	145,300
Dog and cat products | Pet Segment | Operating segments
Segment Reporting Information [Line Items]
Revenues	160,700	145,300
Dog and cat products | Garden Segment | Operating segments
Segment Reporting Information [Line Items]
Revenues	0	0
Other manufacturers' products | Operating segments
Segment Reporting Information [Line Items]
Revenues	147,200	146,900
Other manufacturers' products | Pet Segment | Operating segments
Segment Reporting Information [Line Items]
Revenues	105,000	100,300
Other manufacturers' products | Garden Segment | Operating segments
Segment Reporting Information [Line Items]
Revenues	42,200	46,600
Wild bird products | Operating segments
Segment Reporting Information [Line Items]
Revenues	90,400	86,700
Wild bird products | Pet Segment | Operating segments
Segment Reporting Information [Line Items]
Revenues	36,900	35,900
Wild bird products | Garden Segment | Operating segments
Segment Reporting Information [Line Items]
Revenues	53,500	50,800
Other garden supplies | Operating segments
Segment Reporting Information [Line Items]
Revenues	133,200	127,900
Other garden supplies | Pet Segment | Operating segments
Segment Reporting Information [Line Items]
Revenues	0	0
Other garden supplies | Garden Segment | Operating segments
Segment Reporting Information [Line Items]
Revenues	$ 133,200	$ 127,900