Unverified82% confidenceDecision RuleTime unknown
床垫尺寸应比宠物侧卧完全伸展时的长度长约25%，老年宠物睡眠时间长且需要充分伸展关节，过小的床垫会迫使其蜷缩加重关节僵硬
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82%
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Long-term
Relevance
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Unverified床垫尺寸应比宠物侧卧完全伸展的长度大15-20cm，让四肢可伸直；用体长×1.25估算，过小的床迫使关节炎宠物蜷缩加重关节压力89% similarUnverified宠物床内径应比宠物蜷缩时身长长10-15cm，标注尺寸多为外径，需减去边缘围挡厚度（通常5-10cm）才是实际睡眠区86% similarUnverified床垫越厚越显档次但过厚有隐患：厚度＞25cm需匹配加高床架否则上下床费力，且厚乳胶/记忆棉层会削弱弹簧支撑感，日常用20-25cm弹簧垫最均衡78% similarUnverified床垫总厚度并非越厚越好：20-25cm是主流适用区间，超过30cm多为叠加多层增加成本，实际睡感提升有限，且需注意与床架高度匹配影响上下床便利78% similarUnverified延伸款（可加长床）能覆盖0-6岁甚至0-10岁，但接缝处易产生床垫缝隙和结构晃动；固定尺寸床更稳固。若追求长久使用选延伸款需接受稳定性下降和拼接床垫费用77% similar
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