寵物市場在中國大陸也在朝著萬億（兆）規模發展。荷蘭跨國會計師事務所畢馬威（KPMG）引用Statista數據推算，2025年為8114億元人民幣（1176億美元；3.69兆元新台幣；9191億港元）。
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Before agar, microbiologists had experimented with other foodstuffs as microbial media. They turned to substances rich in the starches, proteins, sugars, fats, and minerals that organisms need for growth, testing with broths, bread, potatoes, polenta, egg whites, coagulated blood serums, and gelatine. However, none worked particularly well: all were easily broken down by heat and microbial enzymes, and their surface, once colonized, became mushy and unsuitable for isolating microbes.